GX1 vs. GH2

Can someone explain to me why so many people are choosing the GX1 and not the GH2: the latter looks better and has the built-in EVF? Is cost the only factor? Why does that recent review of mirrorless cameras on this site refer to the GH2 as a niche camera, best for video--what's wrong with it for stills--in general, and compared with the G3 or GX1 etc.